Math

The Square Root Of -15 Has Been Described As Useless

Announcement: the Curiosity Podcast is finally here! Subscribe on iTunes here, Google Play Music here and add the RSS feed to your favorite podcast player. If you love it please consider leaving us a review.

The square root of negative fifteen has been described as useless, namely by the mathematician who discovered it. But this number, and other imaginary numbers, aren't totally useless, they're just misunderstood. When this square root was discovered, mathematicians just didn't understand the potential for imaginary numbers. Learn the whole story, and why they aren't useless, in the video below.

The Useless Number

It only seemed useless because it was misunderstood.

An Introduction To Imaginary Numbers

In case you need to freshen up.

What Is a Friedman Number?

25 is one of them.

Share the knowledge!
Advertisement